Cylinder for valveless, two-cycle, internal-combustion motors.



G. E. AMON. CYLINDER ronvAnvnLnss, Two-0mm INTERNAL COMBUSTION mo'rons.

APPLIOATIOH TILED APRIL 1913.

Patented July 28, 1914.

INVENTOR CLEMENT E. AMON WQW ATTORNEY ouirizns'rarss ra'ranir FFLGE.

11. AMQ O K' ENIYSLYLVAHIA, assioiioa 'ro CHARLES, H.

l sHnAsLnY, or rmNKL- u,.rENNsYLvAN1A.

sir Emma FOB vALvELE'ss, Two-CYC mriaimairoomaus'rioir morons,

Specification of Letters Patent.

Patented m 28, 1914,

-.-T a l' 'LU ILOIIL it may concern? e it known that I, GIiEMENT E, A y;

citiZeu .of the United. States, residing at .Eranklin, "in the county, of Venango and State offPennsyl a'nia, hax'einvented certain new and useful Improvements in Cylinders for Valveless, Two-Cycle, Internal-Comma ftion Motors, of which the fi'illpvving is a specif cation.

The ob t, construction and utilityof my improved starting; arrangement for valveless, two=cycle, internal-combustion motors,

' are herein set forth with-sufficient clarness to enable those skilled in the art to which it appertains, to make and use the same.

.The object of this invention is,.t0 provide such a construction andequi ment of the I; pump-chamber of the so-ca led valveless type of two-cycle gas and oil engines as w ll Eigure :1; -is a side elevation of a cylinder adapt the same to be more easily started than they are as commonly constructed. -One form .of my improved startipg-arrangement is fully illustrated in the drawi which form a part hereof, the respectiivelfigures of which are as follows of'an internal combustion motor, arranged to be equippedin accordance with my invention.- Fig. 2 isaplan of the fuel-pipe which is used .for-starting-punposes. 3 shows -a.. oylinder.-partially in central, longitudinal section, with the piston in substantially the charging position, preparatory to starting -the;; m otor.: Fig.4 is a fragment of a cylin der} and piston, illustrative of the usual con-' struction' and without the application of my invention. 7

The construction shown in the drawings consists of acylinder 1 an a piston 2 of uniform diameter throughout its length,

. which is operable therein, Said cylinder-is formed at the front end into a-pump-chaniher 3 of larger diaineter than said piston,

closed'in any suitable-manner, as by a head 4; provided with a stiifling-box 5, through }.'which the piston-rod 6 passes. Cylinder 1 is provided with an air-inlet port/I which has -co'inmunication with the interior of the cylinder orpump-chamber, through the ort 18- and a gas-inlet port 8, through which the .charge of fuel enters said pump-chamber 3 as the ports 18 and 8 are uncovered by the piston when it is at the rear or compression end 70f its stroke, as partially shown at Fig. 4. As said piston moves forward, the charge isoompressed in said pump-chamber 3 1Iit-il the by-pass or transfer-port Qisuncovered hy the rear end of the piston; when the fuel- .charge passes to the combustionscham ber 10. I

. that, in order to get a charge of fuel into the pumpchamber, the piston must be positioned at the rear or compression end .of its stroke,yas indicated in Fig. 4, so. that the air and gas port-s18 and S will-'be uncovered,- to permit the passage or intake "of a fuel charge into the pump-chamb'er. withlthe larger sizes of engine, this is a diflicult operation, both on account'of tllQCOiHIJIQSSiOIl in the combustion-chamber, and t he-vacuum.-i n the pump-chamber.

It is the object of this'invention toprovide cylinder construction for -valveless two-cycle engines and an arrangement of fuel-supply for startingpurposesywhich will obviates, said necessity of turning. the crank-a full revolutionwhen starting,-and will adapt the engineto be started w it-ha rocking move-, inent of the crank and a consequent-reciprd eating movement of the piston at apoint where less than the maximum. amount of compression in the combustion-chamber will be caused. I accomplish said object'by 'insertin'g, directly into the pump-chamber 3, at 12, a fuel-pipe,-l"ig. 2.which is provided with an air-supply pipe 13 and .agassupply-pipe 14, also a check-valve 15, said air and gas-supply pipes being controlled by suitable valves 16 and 17, said clieckst vatlve 'lfi'being for the purpose of preventing the escape of the fuel-charge back through this pipe when the charge is compressed in the pump-chamber.

It will now' be readily understood that when any backward. movement ofthe piston from the position shown 'inFigI 3 takes place, a fuel-mixture will be drawn into the 1 pump-chamber through pipe-l2,- and thereby the necessity of causing the-piston to be positioned at the extreme rear end of'its stroke in order to admitfucl to the pumpchamber, is avoided, and when the piston is moved forward to the position'shown in the explosion-chamber, whereby said eX- plosion chamber may be easily filled with a fuel-charge by a rocking movement of the crank, and when so filled, a quick, backward movement of the piston, and the consequent compression in the combustion-chamber, will produce suitable conditions for the ignition of the charge, that will start the engine running, and after it is started, the fuel-su )ply' through pipe 12 will'lie discontinued an the fuel will be taken through.the piston-controlled ports 7 and 8, in the usual manner. On account of the extreme simplicity of the valveless type of the two-cycle gas engines, they are a very desirable power to employ in the oil-fields for pumping wells, since they need much less attention and repair than do engines employing valves; the diflicult-y of starting them, however, as heretofore constructed, has been a serious objection to them, and has prevented the extensive employment of same which-would otherwise have obtained.

In the older oil-producing territory such as that in and contiguous to, the territory in which applicant resides, the production of the individual wells is small, hence the oper ators and producers feel the necessity of keeping'the cost of production as low as possible, and for this reason a' pumping plant is usually in charge of but one man, and if his engine is a hard one to start, it becomes necessary for him to procure assistance for the sole purpose of starting his engine, and this is especially the case i the engine is of the valveless, two-cycle type. On the other hand, if such engine is equipped in accord ance with the construction here shown, the pumper is easily enabled to start same without assistance.

Applicant is fully aware that there are various modifications of the valve type of twocycle engines, such, for instance, as that shown in Letters Patent No. 972,841, issued to C. W. Foster on the 18th day of October, 1910, but this engine being of the valve'type, as explained in the specification forming a portion of the said Letters Patent, the fuelinlet pipes must be supplied with valves, and these cannot be dispensed with at any time during the operation of the engine,

hence the construction there shown is here by spccificall disclaimed,"since applicants valve-control ed fuel port is utilized for the sole purpose of startin the engine, and is cut out or dispensed with during the normal when at the rearward limit of its stroke and.

to have a portion only of its forward end positioned within said p'umpchamber when at the forward end ofits stroke, said pumpchamber being of larger diameter than said piston;-there being a fuel-inlet-port passing through the wall of said cylinder and positioned and adapted to be piston-controlled for the admission of fuel to said pumpehamber, also a fuel passage in said cylinder leading from said pumpehamber to said combustion-chamber the opening of said passage into said combustion-chamber being p0-' sitioned and arranged to be piston-controlled, an auxiliary fuel-inlet leading directly into said pump-chamber, and manually operated valves for controlling the passage of fuel into said auxiliary inlet, "for the purpose set forth.

2. A cylinder for valvelcss two-cycle internal-combustion motors having a combustionchamber and a pump-chamber therein, in combination with a piston of uniform diameter throughout. its length operable within said chambers, said pump-chamber being of larger diameter than said piston, there being a fuel-inlet port passing through the wall of said cylinder positioned anti adapted to be piston-controlled for the admission of fuel to said pump-chamber, also a ,fiwl passage in said cylinder leading from said pump chamber to said combustion chamber, the opening of said passage within saidconibustion-chamber being positioned and arranged to be piston-controlled, an auxiliary fuel inlet leading directly into said pump-chambcr, and means, other thanthe piston, for controlling'the passage of .fuel into, said am:- iliary inlet. I I Q In testimony whereof I afiix my signature in presence of two witnesses.

' CLEMENT E. AMON.

Witnesses 4 P. Bones,

' C. H. Summer. 

